[H. Peter Anvin - Sun, Jul 05, 2009 at 10:30:11AM -0700]| Maciej W. Rozycki wrote:| > | > How do you set cpu_has_apic for systems with discrete local APICs? The | > CPUID flag is not set in this case.| > | | Well, should it be? We do set flags when they're appropriate to us, and| if the semantics are such as that is inappropriate we can set a custom bit.| | -hpa|

Peter, Maciej but how kernel behaved on older cpu long time ago?

I mean -- should user pass "lapic" cmdline option too beable to use apic functionality? (i'm asking since I justdon't know how it had been working before). Currentcode (if only I'm not _missing_ something) relies on cpu_has_apicbit. And even if MP table has been parsed and APIC base found,cpu_has_apic could be not set so detect_init_APIC will failif no "lapic" option passed (in case of old cpu without this cpuidbit produced) as we eventually stay with pic mode.